Slashdot is powered by your submissions, so send in your scoop

 



Forgot your password?
typodupeerror
×

Comment Re: (Score 1) 497

I'm sorry, I just read through that paper, and nowhere in it does it say that a decline in Antarctic ice is a forecast of AGW. That's one of the worst examples of "proof by ghost reference" I've ever seen. Not to mention that the paper is mainly focused on the Antarctic Peninsula, the one place that actually gets melt on more than super-rare occasions and juts into a different climate zone.

Comment Re: (Score 3, Insightful) 497

Go right ahead and point me to where a decline in Antarctic ice was a forecast of AGW.

You do know that - below freezing - there's an inverse correlation between temperature and snowfall, don't you? And I really hope you know that it's very rare that temperatures rise above freezing in the vast majority of Antarctica, whether you add a couple degrees to the temperature or not, right? Or did you not know / ever consider that?

Just because you didn't realize something that should have been really bloody obvious to you doesn't mean it was a scientific prediction by your straw-man scientists.

Comment Mysterious "Aurora" attack not so mysterious. (Score 1) 50

There's nothing mysterious about this. The problem is that if someone gets control of circuit breakers for large rotating equipment, they may be able to disconnect it, let it get out of sync, and reconnect it. This causes huge stresses on motor and generator windings and may damage larger equipment. This is a classic problem in AC electrical systems. A more technical analysis of the Aurora vulnerability is here.

The attack involves taking over control of a power breaker in the transmission system, one that isn't protected by a device that checks for an in-phase condition. Breakers that are intended to be used during synchronization (such as the ones nearest generators) have such protections, but not all breakers do.

Protective relaying in power systems is complicated, because big transient events occur now and then. A lightning strike is a normal event in transmission systems. The system can tolerate many disruptive events, and you don't want to shut everything down and go to full blackout because the fault detection is overly sensitive. A big inductive load joining the grid looks much like an Aurora attack for the first few cycle or two.

There's a problem with someone reprogramming the setpoints on protective relays. This is the classic "let's make it remotely updatable" problem. It's so much easier today to make things remotely updatable than to send someone to adjust a setting. The Aurora attack requires some of this. There's a lot to be said for hard-wired limits that can't be updated remotely, such as "reclosing beyond 20 degrees of phase error is not allowed, no matter what parameters are downloaded."

Comment Web programming sucks. (Score 1) 608

Ignoring the racist whining, he has a point. Web programming really sucks. Even web design sucks.

HTML started as a straightforward declarative layout language. Remember Dreamweaver? Macromedia's WYSIWYG editor for web pages. It was like using a word processor. You laid out a page, and it generated the page in HTML. It understood HTML, and you could read the page back in and edit it. Very straightforward. You didn't even have to look at the HTML. Back then, Netscape Navigator came with an HTML editor, too.

Then came CSS. DIV with float and clear as a primary formatting tool (a 1D concept and a huge step backwards from 2D tables), Javascript to patch the formatting problems of CSS, absolute positioning, Javascript to manage absolute positioning... The reaction to this mess was to layer "content management systems" on top of HTML, introducing another level of complexity and security holes. (Wordpress template attacks...)

It's as bad, if not worse, on the back end. No need to go into the details.

All this is being dumped on programmers, with the demand for "full-stack developers" who understand all the layers. Cheap full-stack developers. Usually for rather banal web sites.

Not only is this stuff unreasonably hard, it's boring. It's a turn-off for anyone with a life.

Comment Re:Not just Obama. (Score 1) 78

Corr: That should read "doesn't lose much IR transmission as a consequence of neutron bombardment like happens in higher frequency bands" - accidentally lost that middle part. Fused silica and fused quartz (especially the latter, but also the former) blacken under neutron exposure, losing transparency; it's even done intentionally to make jewelry. But the papers I ran into when researching the topic showed that this effect isn't very pronounced in the IR band.

Comment Re:Really bad game to use for this comparison. (Score 1) 210

There's a significant issue specific to Titanfall, where the mouse sensitivity is linked to your framerate. If you experience slowdown within the game, a movement of the hand that normally moves the crosshairs 15degrees, may only move it 10 degrees.

It's like trying to aim with someone else's hand on a second mouse fighting back against your crosshairs. That kind of unpredictable mouse sensitivity variation also hits at the most inopportune times since a framerate drop is often concurrent with increased activity in the game.

Most games, even if you drop from 60 fps to 30fps, a hand motion that moves the crosshairs 15 degrees, will still move the crosshairs the same 15 degrees.

Comment Re:Not just Obama. (Score 3, Interesting) 78

Agreed. But that doesn't mean it doesn't make sense to embark on big projects. Rather than a "Hey, we're going to walk somewhere new" sort of thing, I'd like to see work on one of any number of space-related megaprojects - for example, a launch loop and/or fallout-free nuclear rockets**. Something that could actually lower the cost of access to space to the point that it doesn't take a vast effort to go walk on another celestial body.

** - There's so many competing designs it's hard to know where to start. My personal concept I've mulled over is a variant of the nuclear lightbulb concept, but instead of the fused-silica bulb containig a gas or plasma core reactor which requires some unknown containment method, the concept calls for a dusty fission core (akin to a dusty fission fragment rocket), which can be electrostatically contained. The energy would be released in the infrared, not visible or ultraviolet (as in a conventional lightbulb concept), but that's fine - fused silica is also transparent to infrared, and moreover doesn't lose much IR transmission as like happens in higher frequency bands; the lower radiation rate of infrared would be compensated for by the huge surface area of the dust radiating it. The simultaneous huge amounts of electric output (from fission fragment deceleration in a grid) could be used in part to run a microwave beam, creating a plasma sheath in ducted atmospheric air surrounding the bulb (airbreathing mode) or injected gas surrounding it (rocket mode) to aid in IR absorption and keep as much of the heat away from the (reflective) walls as possible. A VASIMR-ish mode is possible if you use low gas injection rates and a magnetic nozzle. In space, gas injection could be terminated altogether and the core could be opened up to run in dusty fission fragment mode and get Isp figures in the lower hundreds of thousands. To make up for the problems with using the standard dusty fission fragment rocket proposal's (heavy) moderator in such a high power environment, my thoughts were to have it operate as a subcritical reactor with a spallation neutron source as the driver - after all, there's no shortage of electricity to run an accelerator if you're decelerating a good chunk of the fragments; you don't even have to deal with Carnot losses.

Comment Re:Just an observation . . . (Score 5, Interesting) 497

Not if you're the Russian intelligence services, the prime suspect behind the hack. Anyone want to bet that this was part of the same initiative that brought us the more recent scandals of Russian state funding for European anti-fracking groups and American lobbying against LNG export approval?

Whatever it takes to keep your main market open, dependent, and buying your main exports in vast quantities, I suppose.

Comment Buzz elaborated on his reasoning yesterday. (Score 4, Informative) 78

Buzz did an AMA yesterday on reddit: http://www.reddit.com/r/IAmA/c...

He elaborated a bit on why he thinks NASA should target Mars, and the short version is that NASA is spread thin with a tiny fraction of the budget it once had to venture to the moon. NASA needs a passion project on which they can fire on all cylinders and do something big. We can visit an asteroid, and few will raise an eyebrow. If we go to Mars, it'll be a landmark achievement that the world will make note of. It's a dream that can focus and revitalize the space program, whereas the asteroid visitation is simply aiming too low as the overarching goal for NASA.

Comment Re:Guam is in the Maldives now? (Score 1) 176

So now that it turns out that this was done in conjunction with the Maldives government, what's your deal?

Is it that you prefer to leave hackers and carders out there robbing people and businesses?

I'm not the biggest fan of America (actually look forward to renouncing my citizenship as soon as I'm able), but seriously, I think you prematurely Godwinned.

Comment Re:Guam is in the Maldives now? (Score 1) 176

That seems to be precisely what his public defender is saying today (see elsewhere in this thread). And that it was done in cooperation with the Maldives government. So it looks like if there's a scandal here it would be the Maldives government breaking their own laws (although I personally have no clue if that would be illegal in the Maldives, or even what legal grounds would have been used)

Slashdot Top Deals

"Protozoa are small, and bacteria are small, but viruses are smaller than the both put together."

Working...